With the two pull-up techniques, your arm muscles get an intense workout.
The difference between pronated and supinated pull-ups is that the biceps work a lot more when doing supinated pull-ups, whereas the back works harder when doing pronated pull-ups.

What size bar should you choose?

The pull-up bar is adjustable and fixes between two walls using pressure.
On a solid door frame.
It is available in 2 sizes
- small, adjustable from 70 to 95 cm
- large, adjustable from 100 to 120 cm.